Windshield wiper



FIG. 1 is a front left side perspective view of a windshield wiper showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is an enlarged right side view thereof; and,

FIG. 7 is an enlarged left side view thereof. 

The ornamental design for a windshield wiper, as shown and described. 